Roof suspended air conditioner



March 13, 1956 Filed June 23, 1954 R. w. KRlTzER 2,73 7,787

ROOF' SUSPENDED AIR CONDITIONER 4 Sheets-Sheet l ooo oo@ oooo goo copooo o March 13, 1956 R. w. KRlTzl-:R

ROOF SUSPENDED AIR CONDITIONER 4 Sheets-Sheet 2 Filed June 23, 1954Mardi 13, 1956 R. w. KRlTzER ROOF SUSPENDED AIR CONDITIONER 4Sheets-Sheet 3 Filed June 23, 1954 March 13, 1956 R. w. KRxTzr-:R2,737,787

ROOF SUSPENDED AIR CONDITIONER Filed June 25, 1954 4 sheetsPShee,c 4

United States Patent ROOF SUSPENDED- AIRCONDITIONER Richard W.Krtzer,Chicago,-Ill. Application .I ime 23, 1954, Serial N o. 440,407 16Claims. (Cl. 62-129) The invention relatesV to air conditioningapparatus.

One object ofthe invention is` to provide air conditioning apparatuswhich includes an assembly of refrigerating apparatus, andan assemblyof"cooling apparatus, and a structure for supportingthe refrigeratingassembly above the roof` or. outside ofthe building, the coolingassembly inside of thei building, and refrigerating connectionsl betweenthe assemblies. in posts between the.

assemblies.

Another Objectis to provide air conditioning, apparatus of this typewith a supporting structure includinga plate mounted overan opening in awall'or roof of the building and posts'havingmembers extending insideand'out-` side of the building for supporting the assemblies.

Anotherobjectof vthe'i'invention is'to provide air con ditioningapparatus for this type, which can be readily installed for use. v

Otherobjects willappear from the detailed'dscription.

The inventions consists in the several novel'fe'atures which arehereinafter described'and 'more particularly dened by theV claims at theconclusion hereof.`

In the drawings:

Fig. 1` is'a section taken on line 1 1' of Fig. 2 ofthe apparatusembodying the invention;A

Fig; 2 is a vertical section taken on line 2'-2 of1 Fig... 1;.

Fig; 3 is a-vertical section ofthe air cooling unit taken on line3'-3=ofFig'. ,5';.

Pig. 4 is a section ofthe refrigerating unit' taken on line 4 4 ofvFig'.5;'

Fig; 5 is a sectiontakenon. line SL-SfofF-ig.` 3;

Fig. 6 is a perspectiveof the section of the casingfor the air-coolingunit which .is attached to thesupporting, posts;

Fig.- 7 isa perspective ofthe removable sectionof the casing `of vtheair coolinglunit;

Fig. 8Vv is a perspectiveof the supporting ,structure-.including`thespostsbetweenthe refr-igeratiiig,ad the air cooling assemblies;

Fig. 9" is a diagrammatic view ofthe electrical -.connec.

tions andl apparatus.

The invention is exemplified in apparatus which. comprises generally asupporting-v., structureA which extends above and below the roof'of 'abuilding, anfassembly of refrigeratingapparatus, generally designateda,sup.-

ported by'said structure over-the roofan..assembly of.

air conditioning y or coolinggapparatus, generally desigf.

nated `b`,V supported by saidQstructure. inside ofthe` build-f ing,l andposts through` which extend therefrig'erant sand.

electric connections' between the refrigeratingvapparatus and thecooling assemblies.'

Thevsupporting structure comprises:` aplate 14, which tits over a: curb16 aroundfan' opening'd in'the'roof of' theabuilding and has fa marginaldepending-ange"17 arouudsaidxurb; a pair of .hollow posts\--10'fandll'fixed* `70 cross section at the lower ends of said:postsfandraLba-ri'to..` plate'y 14I-with1 depending: memberswbelow` plate -14 which .are,rigidly crossz-connectedtby 'alfb'ar 1230i` angular 2,737,787 PatentedMar.` 13, 1956 13 of angulan cross section-above bar 1-2; andupstandingV members. aboveplate 1.4.:which are rigidly cross-connectedThe assembly of refrigerating: apparatusra which ismounted. on the.supportingstructure above the roof of the building, comprises: a.unit24.which includes-a sealedl compressor or pump. andanelectric motor fordriving the compressor and-is mounted on thel plate 14 of the supportingstructure; a` condenser for the refrigerant which includes a coil 25with. the. usual iins and is mountedon and at one` side of the.-upstandingt members of posts 10 and 11, an..air. impeller 2A6lon theshaft of an electric motor'27 which. is mounted` on thetop of the crossbar 15` of the supporting'structure; and a casing- 35V which surroundsthey unit 24, impeller 26, motor 27 and coil25V andis provided .withascreened inlet opening 36 inone side andan outlet 37 across which thecoil 25 extends in thel opposite side..v

The assembly of.coolingrapparatus b is'disposed inside offthe. building.and `supported by the depending members of posts 10 and 11,and/comprises: which includes.. a coil of finned tubing disposed at oneside of posts 10 and .1.1;` anA` air impellerv 41 on the shaft of anelectric motor.42:which isrdernountably supported in a -ring144'whichissupported by, aspider 43 with arms which are iixedtoone side of crossbars12 and 13; and a sectional casingorhousing enclosing thercoolingapparatus. This casingl or housing` has aninlet 4S in one side acrosswh'icliV the* evaporator extendsV and -an outlet in the oppositesideacross ywhich. any air lter- 44 is slid-l ably.supportedandsurroundsimpellerf41, motor` 42 and evaporator 40. The impeller 41 Vdraws-airfrom the inside oflthe buildinganound the-evaporator 4tl-and dischargesit through ,.thealter. 44 inside of the building.

The casingon housing-forr the.cooling apparatus b is` 45. Tlie armsofspider 23 areiixedin section 50. Thev casingsection 58is-removab1ysecuredcto'posts 10 and 11,' mates withfthe inner side ofcasingv section 50, and

comprises: a.top.wal1.54sidewalls 55, a bottom 56V withfr anupstandingmarginal rim.- 57 whichfform a pan for collectingcondensate,`and flanges 57 whichform' a sli'deway for filter 44. The top 54 hasflanges 59 with holes for screws to secure section 58 on section 50, Thesectional formation of Ithe casing, of the. cooling appa-- ratus'permitsthe 'cooling unit vto be narrowed by removal of `section 58-and theimpeller 41, if necessary, so that the remainder 'of `the`unit can belowered through a narrow=opening betweentheljoists of a roof;v Thecompressorfofunit 24-is connected by'a conduit 28"in casing 35 toconduct refrigerant tothe inlet header 29 onV the condenser coil.25;4

A=conduit 32I-for.='refrigerant'inj which-'a'strainer 33 isincluded,.extends.ifrom...thef outlet.header 34 of coil 25K into. -theupperirendf. of post 11.1 and! thence downwardly to..a. member 32a .in`said post; A'nseries of capillary tubes 49 are connected in postl 11toAthellowerend ofmember .32a of. conduit 32- and extend downwardly-inpost. 11 through an opening inits lower end. Twoof the.tubes 49 areconnected` tothe inlet' ends of the coils an evaporator 49' rator 41,comprises: a conduit 64 connected to the outlet header 66 for the uppersection of evaporator 41; an outlet header 65 for the lower section ofsaid evaporator; a strainer 67 to which conduit 64 and header 66 areconnected; a conduit member 31a connected to the outlet of strainer 67,extending through an opening in the lower end of post 11, and thenceupwardly in said post; a conduit member 31b communicatively connectedwith member 31a and extending upwardly through post 11 to the upper endthereof and to the compressor. The portions of the capillary tubes 49and portions of conduit member 31a in post 11 are parallel and solderedtogether for heat interchange to render the refrigerant in the capillarytubes responsive to the temperature in member 31a through which therefrigerant flows from the evaporator to the compressor. This varies therate of flow of the refrigerant to the evaporator responsively to thetemperature to the refrigerant in the suction line.

The condensate from the cooling unit gravitates into the pan formed bybottom 56 and rim 57 of the removable casing section 58. A unit 70includes an electric motor and pump and is mounted on the bottom 56 ofcasing section 53. The pump of said unit has an inlet 71 for liquid onthe bottom 56 and an outlet 72, which is connected by a hose 73 whichextends into the lower end of post 11 and upwardly through the post to aspray pipe 74 in the casing 35 to discharge the condensate onto the coiland fins of condenser and utilize the condensate for cooling thecondenser coil.

In this construction, the conduits for refrigerant between therefrigerating and cooling units, both of which are carried by thesupporting structure which includes posts 10 and 11, pass through saidposts, and are connected to elements mounted in casing 35, and thecasing section 50 which is xedly secured to said posts. As a result, theconduits for the refrigerant between the refrigerating and cooling unitsremain connected when it is necessary to remove casing section 58 forthe installation of the apparatus. The hose 73 through which condensateis pumped to the condenser coil 25, extends through post 11, isdetachably coupled to unit 70 so it can remain in said post during theseparation of casing sections 50 and 58.

The electrical connections and apparatus for the operation of theseveral motors are diagrammatically shown in Fig. 9 and comprise: aterminal block 80 mounted on cross bar 13; line conductors 81 from asource of potential to terminals on block 80, conductors 82 betweenterminals on block 80, and motor 42 which drives the impeller 41;conductors 83 between the terminals on block 80 and the motor in unit 70which drives the condensate pump; conductors'84 which are connected toterminals on block 80 and extend through a portion of post 10 toterminals for the windings of the motor of unit 24; a device 86 forcontrolling current for starting and running motor 24; conductors 87which are connected to the terminals for the windings of motor of unit24 and device 86 for supplying current for starting said motor; aconductor 88 connected to a terminal connected to motor of unit 24 andto device 86 which includes a switch 85 for controlling the current of apredetermined capacity to motor of unit 24; a magnetic relay 89 forcontrolling switch 85; and conductors 90 between the terminals to whichconductors 84 and motor 27 are connected, for supplying current to saidmotor 27 for driving the impeller 26.

These electrical connections and devices are all mounted on thesupporting structure on which the casing and the casing section 50 aremounted. The terminals of conductors 62 for motor 42 are disconnectablefrom block 80 so that said motor and impeller 41 can be removed fromcasing section 50. The terminals of conductors 83 for the motor of unit70 are disconnectable 4 from block to permit removal of the unit 70 withthe casing section 58.

In the installation of the apparatus, an opening is cut in the roof ofthe building, usually between joists, and a curb built around theopening. If the opening d is of sucient width to permit the assembledcasing sections 50 and 58 with the impeller 41 therein, to passtherethrough, the complete cooling assembly b depending from posts 10and 11 is lowered through the opening l until the plate 14 is supportedon the curb 16. The refrigerating apparatus will then be supported overthe roof for cooling the condenser by outside air. The cooling apparatuswill then be mounted for conditioning air inside of the building.

1f the permissible opening in the roof is less in width than the entirecasing of the cooling apparatus, the casing section 58 is detached fromcasing section 5i) and the motor 42 with its impeller 41 is removed fromring 44 after the terminals of conductors 62 for motor 42 and theterminals of conductors 83 for the motor of unit 70 are disconnectedfrom the block 80 and the hose 73 is uncoupled from unit 70. Thisnarrows the width of the apparatus on the lower ends of posts 10 and 11to the width of casing section 50 so that it can be lowered throughopening d and plate 14 placed on the curb 16. The motor 42 and impeller41 are then replaced and the terminals of conductors 62 and conductors83 are connected to block 80. The hose 73 is connected to unit 70 andthe casing section 58 is replaced on the side of posts 10 and 11. Therefrigerating and cooling assemblies will then be restored to operativecondition. The refrigerating assembly with casing 35 on the supportingstructure will be mounted and operative over the roof, and the coolingassembly on said structure will be mounted and operative inside of thebuilding. The refrigerant and condensate conduits between the assemblieswill be enclosed in and extend through one of the hollow posts, and theelectrical conductors 84 will extend through a portion of the otherpost.

The operation will be as follows: When current is supplied to the lineconductors 81, the motor 42 will be operated by current through lineconductors 81 and conductors 82; the motor of unit 70 will be operatedby current through line conductors 81 and conductors 63; the circuit forthe motor of the unit 24 in starting will be through one of theconductors 84, one of the conductors 87, device 86, the other conductor87 in which switch 85 is included, the windings of the motor of unit 24and the other conductor 84, and after starting, the circuit from thedevice 86 will be through conductor 87a to the windings of the motor ofunit 24; and the circuit for the motor 27 which drives impeller 26 willbe through conductors 84 and 89. The motor of unit 24 will operate thecompressor to force refrigerant through conduit 28 to the condenser coil25. From coil 25 it will flow via conduit members 32, 32a, capillarytubes 49, the upper and lower sections of the coils of the evaporator40, outlet headers 65 and 66, strainer 67, conduit members 31a, and 31h,to the suction side of the compressor. The refrigerant will be condensedin coil 25. Tubes 49 are responsive to the temperature of therefrigerant in the suction line to vary the rate of ow of refrigerant tothe evaporator. The impeller 41 will draw air at 45 into the casing'section 50, force it into contact with the evaporator so it will becooled, and then discharge the cooled air through the filter 44 into thespace inside of the building. The impeller 26 will force outside airthrough casing 35 into contact with the coil 25 and its fins, tocondense the refrigerant, and discharge the air above the roof of thebuilding. The motor of unit 70 will operate the pump and force thecondensate which collects on the bottom 56 through hose 73 and dischargeit onto the condenser coil 25, to assist in cooling the refrigerant insaid coil,

arrears# The inventionY exemplifies air conditioning apparatus; whichincludes af casing around-"therefrigeratinggapparatus `which hasopenings in its4 opposite' sidesfor'the-forced'- ow of outsideair-across the heat-'exchanger coilv ofl the condenser and through saidcasing, a separate casing around the air coiling apparatus havingopeningsk in its opposite sides for the How of inside air'aroundthe'evaporatorand through its casing; unitaryV supporting structure andposts which extendV between they separated casings for the refrigeratingapparatus: and the cooling apparatus which includes posts between thelcasing. The posts are hollow and are utilized to enclose the refrigerantand condensate conduits.V TheV apparatus can bereadily installed in theroof of a building atselectedfspots where air conditioning is desired.l

The invention is not to be understood as restricted to the details setforth since these may be modified within the scope of theV appendedclaims without departing from the spirit and scope. ofv the invention.

Having thus described the invention, what- I claim as new and desire tosecure by Letters'Patent is:

l. The combination with an assembly of refrigerating apparatus,comprising: an outside casing having openings for the passage of airtherethrough, a motordriven compressor in said casing, and a condenserincluding a heat exchanger connected to the compressor, and a`motordriven air impeller for forcing air through said casing; and anassembly for cooling air comprising an inside cas-` ing adapted for thepassage of air therethrough, an evaporator in the inside casing, andarnotor-driven impeller for forcing air in contact with theevaporatorandtthrough said inside casing; of a supporting structure'including a.plate itting over an opening in theroofofa building and on which theoutside casing is secured', and a hollow up right post depending.linearly from said' plate', andA on which the .inside casing issupporting underzandvertically spaced. from the. plate andthe roof,.andrefrigerant conduits extending through said post and' betweenrefrigerat; ing apparatus and the evaporator.

2. The combination with an assembly. of refrigerating apparatus,cornprising;,an` outside casing having open-V ings for the passage ofair therethrough.a motor-driven; compressor, and a condenser includingaheat-,exchanger connected to the compressorand a motor-driven airimpeller for forcing air through said: casing;,andv an assemblycomprising an inside casing adapted for the-passage of air therethrough,an evaporator in the inside casing,Y and a motor-driven impeller forforcingair across the evaporator and through saidinside casing; oft asupporting structurer for. the assemblies including af pair of uprightposts, ,adapted to extend throughan opening in, and having members'aboveand below, the roof -ofa building, means on which the postsy aresupported, mounted on the roof over said openingpmeans forsupporting'theheatexchanger and the air impeller therefor on the uppermembers of the posts, and means for supporting the evaporator and theair impellertherefor on the lower members of said posts, andrefrigerant; conduits between the refrigerating apparatus and theevaporator.

3. The combination with an assembly ofrefrigerating apparatus,comprising; an outside casing having openings for the passage of airtherethrough, a motor-driven compressor, and condenser includingaheat-:exchanger connected to the compressor and a motor-driven airimpeller for forcing air throughsaid casing; andan assembly comprisingan inside casingadapted for thepassa'ge of air therethrough, anevaporator inthe insidecasing and a motor-driven impeller forforcing airacross theY evaporator and through said inside: casing; ofta supportingstructure for the assemblies including ai pair ofupright posts, adaptedto extend through an opening in,` and having members above and below,the roof ofa-building, aplate on which the posts and the compressorvareA supported,v mounted on the roofover said opening;meansl forsupporting the= heatsexchanger and the'airimpellerthereforL orr theupper membersof-'the postszabove. the plate, and means'forsupporting theevaporator and the air impeller therefor on the lower-members ofsaid'posts, and refrigerant/conduits between therefrgerating apparatusand the evaporator.

4. The combination with an assembly of refrigerati'ng apparatus,comprising;

an outsideV casingghaving openings for'the passagel of air therethrough,a motor-driven4 compressor, and a condenser'including; a heat-exchangerconnected to the compressor and a motor-driven air impeller for forcingair through said casing; and an assembly comprising an inside casingadapted for the passage of air therethrough', an evaporator in theinsidecasing and a motor-driven impeller for forcing air across the evaporatorand through said inside casing; of a supporting structure for theassemblies including a pair of upright posts, adapted to extendthroughan openingY in, and having members above and below, the roof of abuilding, a plate on which thev posts are supported, mounted on the roofover said opening; means for supporting the heatexchanger and theair-impeller therefor on the upper members ofV the posts above theplate, and means for supporting the' evaporator and the air impellertherefor on the lower members of said posts, and refrigerant conduitsbetween the refrigerating apparatusy and the evaporator.

5. The combination with: an assembly of refrigerating apparatus,comprising; a casingfor the refrigerating apparatus having openings'inopposite sides for the passage of` air therethrough, a motor-drivencompressor, and a condenser including'a heat-exchanger connected to thecompressor and a motor-driven air impeller for forcing air through saidcasing; and an assembly' of cooling apparatus comprising a casing forthe cooling apparatus, having openings in opposite sides, for thepassage of air therethrough, an evaporator in thesinsideV casing and amotor-driven impeller for forcing air; across the evaporator and throughsaid inside casing; of a supporting structure for the assembliesincluding a pair of upright hollow posts, adapted to extend through anopening in, and having members above and below, the roof of a building,a plate on which the posts are supported, mounted on the roof over saidopening; means for supporting the heat-exchanger and the air impellertherefor on the upper members of `the posts above the'plate, and meansfor supporting the evaporator and the air impeller therefor on the lowermembers of saidposts, and refrigerantconduits between-therefrigeratingrapparatus and the evaporator having portions extendingthrough one of the posts.

6.. The combination with: an assembly of refrigerating apparatus,comprising; a casing, for the refrigerating apparatusV having openingsin opposite sides. for the'passage of air therethrough, a motondrivencompressor, and a condenser including a heat-exchanger connected to thecompressor and a motor-driven airimpeller for forcing air through saidcasing;.and an assembly comprising an inside casing: having openings inopposite sides for the passage. of air'therethrough, an evaporator inthe casing for the cooling apparatus, and a motor-driven impeller forforcing air across the evaporator and through said casing for thecooling apparatus; of. a supporting structure for the assembliesincluding a pair ofl upright posts, adapted to extendv through anopening in, and having members` above andbelow the. roofof abuilding, a`plate on which the. posts are supported, mountedon the roof over saidopening; means for supporting the heat-exchanger andtheair impellertherefor from the members of the posts, above the plate, means forsupporting the evaporator and the air impeller therefor from the lower`members of said posts, and refrigerant conduits between therefrigerating apparatus and the evaporator having portions extendingthrough' one ofl the f posts.

7. The combination with: an assembly of refrigerating apparatus,comprising; a casing; for.v the refrigerating apparatus' having openingsfor the passage of" air there.-

through', a motor-driven compressor, andV a condenser'l including aheat-exchanger connected to the compressor and a motor-driven airimpeller for forcing air through said casing; and an assembly of coolingapparatus comprising a casing for the cooling apparatus having openingsfor the passage of air therethrough, an evaporator in the easing for thecooling apparatus, and a motordriven impeller for forcing air across theevaporator and through said last-named casing; of a supporting structurefor the assemblies including a pair of upright hollow posts, adapted toextend through an opening in and above and below the roof of a building,a plate on which the posts are supported, mounted on the roof aroundsaid opening; a cross bar between the posts on which the motor-drivenimpeller is mounted, the compressor being mounted on said plate, andmeans for supporting the evaporator and the air impeller therefor fromlower members of said posts, the compressor being mounted on said plate;and refrigerant conduits between the refrigerating apparatus and theevaporator having portions extending through one of the posts.

8. The combination with an assembly of refrigerating apparatus,comprising; a casing for the refrigerating apparatus having openings inopposite sides for the passage of air therethrough, a motor-drivencompressor, and a conductor connected to the compressor, including aheatexchanger and a motor-driven air impeller for forcing air throughsaid casing; and an assembly of cooling apparatus comprising a casingfor the cooling apparatus having openings in opposite sides for thepassage of air therethrough, a motor-driven impeller for forcing airacross the evaporator and through said last named casing; of asupporting structure including posts between the assemblies, extendingthrough an opening in, and outside and inside of a wall of, a building,a plate over said opening, to which the posts are secured, a cross barbetween the posts on which the motor-driven impeller for thc heatexchanger is mounted, cross bars between the posts on which the motorand impeller for the evaporator are secured, and refrigerant conduitsbetween the evaporator and the refrigerating apparatus having portionsthereof extending through one of said posts.

9. The combination with an assembly of refrigerating apparatus,comprising; a casing for the refrigerating a,- paratus having openingsfor the passage of air therethrough, a motor-driven compressor, and acondenser connected to the compressor, including a heat-exchanger and amotor-driven air impeller for cooling air through said casing; and anassembly comprising an inside casing, including separable matingsections, a motor-driven impeller for forcing air across the evaporatorand through said inside casing; of a supporting structure, includingposts between the assemblies, extending through an opening in, andoutside and inside of the roof of, a building, means over said openingto which the posts are secured, refrigerant conduits between theevaporator and the refrigerating apparatus, one of the sections of thecasing being fixedly mounted on the posts, and the other section beingremovably secured to the posts, the motor and impeller for theevaporator being removably mounted in the fixed casing section.

10. The combination with an assembly of refrigerating apparatus,comprising; a casing for the refrigerating apparatus having openings forthe passage of air therethrough, a motor-driven compressor, and acondenser connected to the compressor, including a heat-exchanger and amotor-driven air impeller for forcing air through said casing; and anassembly comprising an inside casing, including separable matingsections, a motor-driven impeller for forcing air across the evaporatorand through said inside casing; of a supporting structure, includingposts between the assemblies, extending through an opening in, andoutside and inside of the roof of, a building, means over said openingsto which the posts are secured,

refrigerant conduits between the evaporator and the refrigeratingapparatus, having portions extending through Cil one of the posts, oneof the sections of the casing being xedly mounted on the posts, and theother section being removably secured to the posts, the motor andimpeller for the evaporator being removably mounted in the fixed casingsection.

11. The combination with an assembly of refrigerating apparatus,comprising; a casing for the refrigerating apparatus having openings forthe passage of air therethrough, a motor-driven compressor, and acondenser connected to the compressor, including a heat-exchanger and amotor-driven air impeller for forcing air through said casing; and anassembly comprising an inside casing, including separable matingsections, a motor-driven impeller for forcing air across the evaporatorand through said inside casing; of a supporting structure, includingposts between the assemblies, extending through an opening in, andoutside and inside of the roof of, a building, means over said openingto which the posts are secured, refrigerant conduits between theevaporator and the rcfrigerating apparatus, one of the sections of thecasing being tixedly mounted on the posts, and the other section beingremovably secured to the posts, the motor and impeller for theevaporator being removably mounted in the xed casing section, theevaporator being mounted in the fixed section.

12. The combination with; an assembly of refrigerating apparatuscomprising, a casing for the refrigerating apparatus having openings inopposite ends for the passage of air therethrough, a motor-drivencompressor, and a condenser connected to the compressor including aheatexchanger, and a motor-driven air impeller for forcing air throughsaid casing; and an assembly of cooling apparatus comprising a casingtherefor having openings in opposite sides for the passage of airtherethrough, and means for collecting condensate, a motor-drivenimpeller for forcing air across the evaporator and through the casing ofthe cooling apparatus, and a pump for the condensate; of a supportingstructure for said assemblies, including posts between the assemblies,extending through an opening in, and outside and inside of the roof of,a building, refrigerant conduits between the evaporator and therefrigeting apparatus, and a conduit between the pump and theheat-exchanger of the condenser.

13. The combination with; an assembly of refrigerating apparatuscomprising, a casing for the refrigerating apparatus having openings inopposite ends for the passage of air therethrough, a motor-drivencompressor, and a condenser connected. to the compressor including aheat-exchanger, and a motor-driven air impeller for forcing air throughsaid casing; and an assembly of cooling apparatus comprising a casingtherefor, having openings in opposite sides for the passage of airtherethrough, and means for collecting condensate, a motor-drivenimpeller for forcing air across the evaporator and through the casing ofthe cooling apparatus, and a pump for the condensate; of a supportingstructure for said assemblies, including posts between the assemblies,extending through an opening in, and outside and inside of the roof of,a building, refrigerant conduits between the evaporator and therefrigerating apparatus, and a conduit between the pump and theheat-exchanger of the condenser, extending through one of said posts.

14. The combination with; an assembly of refrigerating apparatuscomprising; a casing for the refrigerating apparatus having openings inoppositc ends for the passage of air therethrough, a motor-drivencompressor, and a condenser connected to the compressor including aheat-exchanger, and a motor-driven air impeller for forcing air throughsaid casing; and an assembly of cooling apparatus comprising a casingtherefor, having openings in opposite sides for the passage of airtherethrough, a motor-driven impeller for forcing air across theevaporator and through its casing; of a supporting structure for saidassemblies, including posts between the assemblies, extending through anopening in, and

outside and inside of the roof of, a building, a plate over said openingto which the posts are secured, a cross-bar between the posts on whichthe motor-driven impeller of the refrigerating apparatus is mounted,cross-bars between the posts on which the motor and impeller of thecooling apparatus are mounted, and refrigerant conduits between theevaporator and the refrigerating apparatus, extending through one of theposts.

15. The combination with; an assembly of refrigerating apparatuscomprising, a casing for the refrigerating apparatus having openings inopposite ends for the passage of air therethrough, a motor-drivencompressor, and a condenser connected to the compressor including aheat-exchanger, and a motor-driven air impeller for forcing air throughsaid casing; and an assembly of cooling apparatus comprising a casingtherefor, having openings in opposite sides for the passage of airtherethrough, a motor-driven impeller for forcing air across theevaporator and through its casing; of a supporting structure for saidassemblies, including posts between the assemblies, extending through anopening in, and outside and inside of the roof of, a building, a plateover said opening to which the posts are secured and on which thecompressor is mounted, a cross-bar between the posts on which themotor-driven impeller of the refrigerating apparatus is mounted,cross-bars between the posts on which the motor and impeller of thecooling apparatus is mounted, refrigerant conduits between theevaporator and the refrigerating apparatus, extending through one of theposts.

16. The combination with; an assembly of refrigerating apparatuscomprising, a casing for the refrigerating apparatus having openings forthe passage of air therethrough, a motor-driven compressor, and acondenser connected to the compressor including a heat-exchanger, andamotor-driven air impeller for forcing air through said casing; and anassembly of cooling apparatus comprising a casing therefor, the coolingapparatus having openings for the passage of air therethrough, amotordriven impeller for forcing air across the evaporator and throughthe last named casing; of a supporting structure for said assemblies,including posts between the assemblies, extending through an opening in,and outside and inside of the roof of, a building, means over saidopening to which the posts are secured, refrigerant conduits between theevaporator and the refrigerating apparatus, and electrical connectionsfor the compressor motor and the impeller motor of the refrigeratingapparatus, extending through one of the posts.

References Cited inthe le of this patent UNITED STATES PATENTS 2,180,915Stebbins Nov. 21, 1939 2,232,235 Hintze Feb. 18, 1941 2,303,577Ottenheimer Dec. 1, 1942 2,443,472 Mayo June 15, 1948 2,475,841 JonesJuly 12, 1949 2,500,852 Money Mar. 14, 1950 2,682,757 Borgerd July 6,1954

